Orbital non-fermi-liquid behavior in cubic ruthenates

We peruse various anomalous physical responses of the cubic (ferromagnetic SrRuO3 and paramagnetic CaRuO3) ruthenates, such as fractional power-law conductivity, anomalous Raman line shapes, and Hall currents. We show how these exciting power-law observations are naturally described within a new, lo...

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Bibliographic Details
Published in:Physical review letters 2008-03, Vol.100 (9), p.096402-096402, Article 096402
Main Authors: Laad, M S, Bradarić, I, Kusmartsev, F V
Format: Article
Language:English
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Summary:We peruse various anomalous physical responses of the cubic (ferromagnetic SrRuO3 and paramagnetic CaRuO3) ruthenates, such as fractional power-law conductivity, anomalous Raman line shapes, and Hall currents. We show how these exciting power-law observations are naturally described within a new, local (orbital) non-Fermi-liquid state arising from strong, multiorbital Coulomb interactions. Introducing a multiorbital, correlated model treated within the dynamical mean-field theory, we also find two distinct relaxation rates for relaxation of transport in complete agreement with experiment.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.100.096402